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PEACTICAL PHOTO-MICROGRAPHY 



carried on an optical bench, it must be arranged that the latter 

 can be either swung out at right angles, or that an additional 

 carrying-bar can be placed in the desired position. 



An entirely new type of apparatus for metallurgical work 

 is one recently introduced by Messrs. Leitz, and known as their 

 micro-metallograph (Fig. 53). This apparatuses designed for 

 visual observation, as well as for photo-micrography. Its novelty 

 consists in the manner in which the object is supported in 



